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   &#160;<span id="projectnumber">1.3.2</span>
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   <div id="projectbrief">Generic LCD control library</div>
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  <div class="headertitle">
<div class="title">/Users/fmalpartida/Documents/development/mercurial repos/SW/NewliquidCrystal/LiquidCrystal_SR.h</div>  </div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">// ---------------------------------------------------------------------------</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment">// Created by Francisco Malpartida on 20/08/11.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment">// Copyright 2011 - Under creative commons license 3.0:</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment">//        Attribution-ShareAlike CC BY-SA</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment">// This software is furnished &quot;as is&quot;, without technical support, and with no </span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment">// warranty, express or implied, as to its usefulness for any purpose.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment">// Thread Safe: No</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment">// Extendable: Yes</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment">// @file LiquidCrystal_SR.h</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment">//  Connects an LCD using 2 or 3 pins from the Arduino, via an 8-bit </span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment">// ShiftRegister (SR from now on).</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment">// </span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment">// @brief </span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment">// This is a port of the ShiftRegLCD library from raron and ported to the</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment">// LCD library.</span></div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment">// The functionality provided by this class and its base class is identical</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment">// to the original functionality of the Arduino LiquidCrystal library and can</span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment">// be used as such.</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment">// Modified to work serially with the shiftOut() function, an 8-bit</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="comment">// unlatched, no-tristate, unidirectional SIPO (Serial-In-Parallel-Out)</span></div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="comment">// shift register (IE a very simple SR), and an LCD in 4-bit mode.</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment">// Any such shift register should do (pref. 74LS family IC&#39;s for 2-wire).</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment">// I used 74LS164, for the reason that&#39;s what I had at hand.</span></div>
<div class="line"><a name="l00029"></a><span class="lineno">   29</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00030"></a><span class="lineno">   30</span>&#160;<span class="comment">// Connection description:</span></div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00032"></a><span class="lineno">   32</span>&#160;<span class="comment">// SR output:</span></div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="comment">// Bit  #0   - N/C - not connected, used to hold a zero</span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment">// Bit  #1   - N/C</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment">// Bit  #2   - connects to RS (Register Select) on the LCD</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="comment">// Bits #3-6 - connects to LCD data inputs D4 - D7.</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="comment">// Bit  #7   - enables the LCD enable-puls (via the diode-resistor AND &quot;gate&quot;)</span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="comment">// 2 or 3 Pins required from the Arduino for Data, Clock and (optional) Enable</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="comment">// If not using Enable, the Data pin will be used for the enable signal.</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="comment">// 2 wire mode can be indicated by:</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="comment">// - ommitting the enable pin in constructor</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="comment">// - defining the same pin for Enable as for Data in constructor</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="comment">// - by using the token TWO_WIRE for the enable pin.</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="comment">// Data and Clock outputs/pins goes to the shiftregister.</span></div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="comment">// LCD RW-pin hardwired to LOW (only writing to LCD).</span></div>
<div class="line"><a name="l00048"></a><span class="lineno">   48</span>&#160;<span class="comment">// Busy Flag (BF, data bit D7) is not read.</span></div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;<span class="comment">//  Original project homepage: http://code.google.com/p/arduinoshiftreglcd/</span></div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="comment">// History</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="comment">// 2012.03.29  bperrybap - can now eliminate enable pin in constructor for two wire mode.</span></div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="comment">// 2011.10.29  fmalpartida - adaption of the library to the LCD class hierarchy.</span></div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="comment">// 2011.07.02  Fixed a minor flaw in setCursor function. No functional change, </span></div>
<div class="line"><a name="l00057"></a><span class="lineno">   57</span>&#160;<span class="comment">//             just a bit more memory efficient.</span></div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="comment">//             Thanks to CapnBry (from google code and github) who noticed it.</span></div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="comment">//             URL to his version of shiftregLCD:</span></div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;<span class="comment">//             https://github.com/CapnBry/HeaterMeter/commit/c6beba1b46b092ab0b33bcbd0a30a201fd1f28c1</span></div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="comment">// 2009.07.30  raron - minor corrections to the comments.</span></div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="comment">//             Fixed timing to datasheet safe. Fixed keyword highlights.</span></div>
<div class="line"><a name="l00063"></a><span class="lineno">   63</span>&#160;<span class="comment">// 2009.07.28  Mircho / raron - a new modification to the schematics, and a</span></div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;<span class="comment">//             more streamlined interface</span></div>
<div class="line"><a name="l00065"></a><span class="lineno">   65</span>&#160;<span class="comment">// 2009.07.27  Thanks to an excellent suggestion from mircho at the Arduiono </span></div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;<span class="comment">//             playgrond forum, the number of wires now required is only two!</span></div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;<span class="comment">// 2009.07.25  raron - Fixed comments. I really messed up the comments before </span></div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;<span class="comment">//             posting this, so I had to fix it.</span></div>
<div class="line"><a name="l00069"></a><span class="lineno">   69</span>&#160;<span class="comment">//             Renamed a function, but no improvements or functional changes.</span></div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;<span class="comment">// 2009.07.23  Incorporated some proper initialization routines</span></div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;<span class="comment">//             inspired (lets say copy-paste-tweaked) from LiquidCrystal</span></div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;<span class="comment">//             library improvements from LadyAda.</span></div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="comment">// 2009.05.23  raron - first version, but based mostly (as in almost verbatim)</span></div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="comment">//             on the &quot;official&quot; LiquidCrystal library.</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;<span class="comment">//</span></div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;<span class="comment">// @author F. Malpartida - fmalpartida@gmail.com</span></div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;<span class="comment">// ---------------------------------------------------------------------------</span></div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;<span class="preprocessor">#ifndef _LIQUIDCRYSTAL_SR_</span></div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;<span class="preprocessor">#define _LIQUIDCRYSTAL_SR_</span></div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;<span class="preprocessor">#include &lt;inttypes.h&gt;</span></div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="preprocessor">#include &quot;LCD.h&quot;</span></div>
<div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;<span class="preprocessor">#include &quot;FastIO.h&quot;</span></div>
<div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;</div>
<div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;</div>
<div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;<span class="comment">// two-wire indicator constant</span></div>
<div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;<span class="comment">// ---------------------------------------------------------------------------</span></div>
<div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;<span class="preprocessor">#define TWO_WIRE  204</span></div>
<div class="line"><a name="l00091"></a><span class="lineno">   91</span>&#160;<span class="preprocessor">#define SR_RS_BIT 0x04</span></div>
<div class="line"><a name="l00092"></a><span class="lineno">   92</span>&#160;<span class="preprocessor">#define SR_EN_BIT 0x80</span></div>
<div class="line"><a name="l00093"></a><span class="lineno">   93</span>&#160;</div>
<div class="line"><a name="l00094"></a><span class="lineno"><a class="line" href="class_liquid_crystal___s_r.html">   94</a></span>&#160;<span class="keyword">class </span><a class="code" href="class_liquid_crystal___s_r.html">LiquidCrystal_SR</a> : <span class="keyword">public</span> <a class="code" href="class_l_c_d.html">LCD</a></div>
<div class="line"><a name="l00095"></a><span class="lineno">   95</span>&#160;{</div>
<div class="line"><a name="l00096"></a><span class="lineno">   96</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00108"></a><span class="lineno">  108</span>&#160;   <a class="code" href="class_liquid_crystal___s_r.html#ac3fe0b48f8d4c1c941d82d1333495cfc">LiquidCrystal_SR</a> ( uint8_t srdata, uint8_t srclock, uint8_t enable=TWO_WIRE );</div>
<div class="line"><a name="l00109"></a><span class="lineno">  109</span>&#160;   </div>
<div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;   <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_liquid_crystal___s_r.html#a03821351a32db07cb7e42c8c11ce8d47">send</a>(uint8_t value, uint8_t mode);</div>
<div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;   </div>
<div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;   </div>
<div class="line"><a name="l00134"></a><span class="lineno">  134</span>&#160;   <span class="keywordtype">void</span> <a class="code" href="class_liquid_crystal___s_r.html#a5bfc0dcc1f042bcb59992493a3a7231d">setBacklightPin</a> ( uint8_t pin, t_backlighPol pol );</div>
<div class="line"><a name="l00135"></a><span class="lineno">  135</span>&#160;   </div>
<div class="line"><a name="l00145"></a><span class="lineno">  145</span>&#160;   <span class="keywordtype">void</span> <a class="code" href="class_liquid_crystal___s_r.html#ad9f3e3f36257984c23fb508973e14535">setBacklight</a> ( uint8_t mode );</div>
<div class="line"><a name="l00146"></a><span class="lineno">  146</span>&#160;   </div>
<div class="line"><a name="l00147"></a><span class="lineno">  147</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00148"></a><span class="lineno">  148</span>&#160;   </div>
<div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;   <span class="keywordtype">void</span> init ( uint8_t srdata, uint8_t srclock, uint8_t enable, uint8_t lines, </div>
<div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;              uint8_t font );</div>
<div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;   </div>
<div class="line"><a name="l00161"></a><span class="lineno">  161</span>&#160;   <span class="keywordtype">void</span> shiftIt (uint8_t val);</div>
<div class="line"><a name="l00162"></a><span class="lineno">  162</span>&#160;   </div>
<div class="line"><a name="l00163"></a><span class="lineno">  163</span>&#160;   uint8_t _enable_pin;  <span class="comment">// Enable Pin</span></div>
<div class="line"><a name="l00164"></a><span class="lineno">  164</span>&#160;   uint8_t _two_wire;    <span class="comment">// two wire mode</span></div>
<div class="line"><a name="l00165"></a><span class="lineno">  165</span>&#160;   </div>
<div class="line"><a name="l00166"></a><span class="lineno">  166</span>&#160;   fio_register _srDataRegister; <span class="comment">// Serial Data pin</span></div>
<div class="line"><a name="l00167"></a><span class="lineno">  167</span>&#160;   fio_bit _srDataBit;</div>
<div class="line"><a name="l00168"></a><span class="lineno">  168</span>&#160;   fio_register _srClockRegister; <span class="comment">// Clock Pin</span></div>
<div class="line"><a name="l00169"></a><span class="lineno">  169</span>&#160;   fio_bit _srClockBit;</div>
<div class="line"><a name="l00170"></a><span class="lineno">  170</span>&#160;   fio_register _srEnableRegister; <span class="comment">// Enable Pin</span></div>
<div class="line"><a name="l00171"></a><span class="lineno">  171</span>&#160;   fio_bit _srEnableBit;</div>
<div class="line"><a name="l00172"></a><span class="lineno">  172</span>&#160;   </div>
<div class="line"><a name="l00173"></a><span class="lineno">  173</span>&#160;};</div>
<div class="line"><a name="l00174"></a><span class="lineno">  174</span>&#160;</div>
<div class="line"><a name="l00175"></a><span class="lineno">  175</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00176"></a><span class="lineno">  176</span>&#160;</div>
<div class="ttc" id="class_l_c_d_html"><div class="ttname"><a href="class_l_c_d.html">LCD</a></div><div class="ttdef"><b>Definition:</b> LCD.h:187</div></div>
<div class="ttc" id="class_liquid_crystal___s_r_html_ac3fe0b48f8d4c1c941d82d1333495cfc"><div class="ttname"><a href="class_liquid_crystal___s_r.html#ac3fe0b48f8d4c1c941d82d1333495cfc">LiquidCrystal_SR::LiquidCrystal_SR</a></div><div class="ttdeci">LiquidCrystal_SR(uint8_t srdata, uint8_t srclock, uint8_t enable=TWO_WIRE)</div><div class="ttdef"><b>Definition:</b> LiquidCrystal_SR.cpp:98</div></div>
<div class="ttc" id="class_liquid_crystal___s_r_html_ad9f3e3f36257984c23fb508973e14535"><div class="ttname"><a href="class_liquid_crystal___s_r.html#ad9f3e3f36257984c23fb508973e14535">LiquidCrystal_SR::setBacklight</a></div><div class="ttdeci">void setBacklight(uint8_t mode)</div><div class="ttdef"><b>Definition:</b> LiquidCrystal_SR.cpp:207</div></div>
<div class="ttc" id="class_liquid_crystal___s_r_html_a03821351a32db07cb7e42c8c11ce8d47"><div class="ttname"><a href="class_liquid_crystal___s_r.html#a03821351a32db07cb7e42c8c11ce8d47">LiquidCrystal_SR::send</a></div><div class="ttdeci">virtual void send(uint8_t value, uint8_t mode)</div><div class="ttdef"><b>Definition:</b> LiquidCrystal_SR.cpp:172</div></div>
<div class="ttc" id="class_liquid_crystal___s_r_html"><div class="ttname"><a href="class_liquid_crystal___s_r.html">LiquidCrystal_SR</a></div><div class="ttdef"><b>Definition:</b> LiquidCrystal_SR.h:94</div></div>
<div class="ttc" id="class_liquid_crystal___s_r_html_a5bfc0dcc1f042bcb59992493a3a7231d"><div class="ttname"><a href="class_liquid_crystal___s_r.html#a5bfc0dcc1f042bcb59992493a3a7231d">LiquidCrystal_SR::setBacklightPin</a></div><div class="ttdeci">void setBacklightPin(uint8_t pin, t_backlighPol pol)</div><div class="ttdef"><b>Definition:</b> LiquidCrystal_SR.cpp:202</div></div>
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